.install_form{
    font-size: 16px;
    margin:10px 0;
    font-weight: bold;
}
.install_form span{
    float: left;
    display: inline-block;
    width:30%;
}
.install_index_input{
    width:30%;
    text-align: center;
    display: inline-block;
    word-wrap: break-word;
}